1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _FS_CEPH_SUPER_H 3 #define _FS_CEPH_SUPER_H 4 5 #include <linux/ceph/ceph_debug.h> 6 7 #include <asm/unaligned.h> 8 #include <linux/backing-dev.h> 9 #include <linux/completion.h> 10 #include <linux/exportfs.h> 11 #include <linux/fs.h> 12 #include <linux/mempool.h> 13 #include <linux/pagemap.h> 14 #include <linux/wait.h> 15 #include <linux/writeback.h> 16 #include <linux/slab.h> 17 #include <linux/posix_acl.h> 18 #include <linux/refcount.h> 19 #include <linux/security.h> 20 21 #include <linux/ceph/libceph.h> 22 23 #ifdef CONFIG_CEPH_FSCACHE 24 #include <linux/fscache.h> 25 #endif 26 27 /* f_type in struct statfs */ 28 #define CEPH_SUPER_MAGIC 0x00c36400 29 30 /* large granularity for statfs utilization stats to facilitate 31 * large volume sizes on 32-bit machines. */ 32 #define CEPH_BLOCK_SHIFT 22 /* 4 MB */ 33 #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT) 34 35 #define CEPH_MOUNT_OPT_CLEANRECOVER (1<<1) /* auto reonnect (clean mode) after blacklisted */ 36 #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */ 37 #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */ 38 #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */ 39 #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */ 40 #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */ 41 #define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */ 42 #define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */ 43 #define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */ 44 #define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */ 45 #define CEPH_MOUNT_OPT_NOCOPYFROM (1<<14) /* don't use RADOS 'copy-from' op */ 46 #define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15) /* allow async directory ops */ 47 48 #define CEPH_MOUNT_OPT_DEFAULT \ 49 (CEPH_MOUNT_OPT_DCACHE | \ 50 CEPH_MOUNT_OPT_NOCOPYFROM) 51 52 #define ceph_set_mount_opt(fsc, opt) \ 53 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt 54 #define ceph_clear_mount_opt(fsc, opt) \ 55 (fsc)->mount_options->flags &= ~CEPH_MOUNT_OPT_##opt 56 #define ceph_test_mount_opt(fsc, opt) \ 57 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt)) 58 59 /* max size of osd read request, limited by libceph */ 60 #define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN 61 /* osd has a configurable limitaion of max write size. 62 * CEPH_MSG_MAX_DATA_LEN should be small enough. */ 63 #define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN 64 #define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */ 65 #define CEPH_MAX_READDIR_DEFAULT 1024 66 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024) 67 #define CEPH_SNAPDIRNAME_DEFAULT ".snap" 68 69 /* 70 * Delay telling the MDS we no longer want caps, in case we reopen 71 * the file. Delay a minimum amount of time, even if we send a cap 72 * message for some other reason. Otherwise, take the oppotunity to 73 * update the mds to avoid sending another message later. 74 */ 75 #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */ 76 #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */ 77 78 struct ceph_mount_options { 79 unsigned int flags; 80 81 unsigned int wsize; /* max write size */ 82 unsigned int rsize; /* max read size */ 83 unsigned int rasize; /* max readahead */ 84 unsigned int congestion_kb; /* max writeback in flight */ 85 unsigned int caps_wanted_delay_min, caps_wanted_delay_max; 86 int caps_max; 87 unsigned int max_readdir; /* max readdir result (entries) */ 88 unsigned int max_readdir_bytes; /* max readdir result (bytes) */ 89 90 /* 91 * everything above this point can be memcmp'd; everything below 92 * is handled in compare_mount_options() 93 */ 94 95 char *snapdir_name; /* default ".snap" */ 96 char *mds_namespace; /* default NULL */ 97 char *server_path; /* default NULL (means "/") */ 98 char *fscache_uniq; /* default NULL */ 99 }; 100 101 struct ceph_fs_client { 102 struct super_block *sb; 103 104 struct list_head metric_wakeup; 105 106 struct ceph_mount_options *mount_options; 107 struct ceph_client *client; 108 109 unsigned long mount_state; 110 111 unsigned long last_auto_reconnect; 112 bool blacklisted; 113 114 bool have_copy_from2; 115 116 u32 filp_gen; 117 loff_t max_file_size; 118 119 struct ceph_mds_client *mdsc; 120 121 atomic_long_t writeback_count; 122 123 struct workqueue_struct *inode_wq; 124 struct workqueue_struct *cap_wq; 125 126 #ifdef CONFIG_DEBUG_FS 127 struct dentry *debugfs_dentry_lru, *debugfs_caps; 128 struct dentry *debugfs_congestion_kb; 129 struct dentry *debugfs_bdi; 130 struct dentry *debugfs_mdsc, *debugfs_mdsmap; 131 struct dentry *debugfs_metric; 132 struct dentry *debugfs_mds_sessions; 133 #endif 134 135 #ifdef CONFIG_CEPH_FSCACHE 136 struct fscache_cookie *fscache; 137 #endif 138 }; 139 140 141 /* 142 * File i/o capability. This tracks shared state with the metadata 143 * server that allows us to cache or writeback attributes or to read 144 * and write data. For any given inode, we should have one or more 145 * capabilities, one issued by each metadata server, and our 146 * cumulative access is the OR of all issued capabilities. 147 * 148 * Each cap is referenced by the inode's i_caps rbtree and by per-mds 149 * session capability lists. 150 */ 151 struct ceph_cap { 152 struct ceph_inode_info *ci; 153 struct rb_node ci_node; /* per-ci cap tree */ 154 struct ceph_mds_session *session; 155 struct list_head session_caps; /* per-session caplist */ 156 u64 cap_id; /* unique cap id (mds provided) */ 157 union { 158 /* in-use caps */ 159 struct { 160 int issued; /* latest, from the mds */ 161 int implemented; /* implemented superset of 162 issued (for revocation) */ 163 int mds, mds_wanted; 164 }; 165 /* caps to release */ 166 struct { 167 u64 cap_ino; 168 int queue_release; 169 }; 170 }; 171 u32 seq, issue_seq, mseq; 172 u32 cap_gen; /* active/stale cycle */ 173 unsigned long last_used; 174 struct list_head caps_item; 175 }; 176 177 #define CHECK_CAPS_AUTHONLY 1 /* only check auth cap */ 178 #define CHECK_CAPS_FLUSH 2 /* flush any dirty caps */ 179 #define CHECK_CAPS_NOINVAL 4 /* don't invalidate pagecache */ 180 181 struct ceph_cap_flush { 182 u64 tid; 183 int caps; /* 0 means capsnap */ 184 bool wake; /* wake up flush waiters when finish ? */ 185 struct list_head g_list; // global 186 struct list_head i_list; // per inode 187 }; 188 189 /* 190 * Snapped cap state that is pending flush to mds. When a snapshot occurs, 191 * we first complete any in-process sync writes and writeback any dirty 192 * data before flushing the snapped state (tracked here) back to the MDS. 193 */ 194 struct ceph_cap_snap { 195 refcount_t nref; 196 struct list_head ci_item; 197 198 struct ceph_cap_flush cap_flush; 199 200 u64 follows; 201 int issued, dirty; 202 struct ceph_snap_context *context; 203 204 umode_t mode; 205 kuid_t uid; 206 kgid_t gid; 207 208 struct ceph_buffer *xattr_blob; 209 u64 xattr_version; 210 211 u64 size; 212 u64 change_attr; 213 struct timespec64 mtime, atime, ctime, btime; 214 u64 time_warp_seq; 215 u64 truncate_size; 216 u32 truncate_seq; 217 int writing; /* a sync write is still in progress */ 218 int dirty_pages; /* dirty pages awaiting writeback */ 219 bool inline_data; 220 bool need_flush; 221 }; 222 223 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) 224 { 225 if (refcount_dec_and_test(&capsnap->nref)) { 226 if (capsnap->xattr_blob) 227 ceph_buffer_put(capsnap->xattr_blob); 228 kfree(capsnap); 229 } 230 } 231 232 /* 233 * The frag tree describes how a directory is fragmented, potentially across 234 * multiple metadata servers. It is also used to indicate points where 235 * metadata authority is delegated, and whether/where metadata is replicated. 236 * 237 * A _leaf_ frag will be present in the i_fragtree IFF there is 238 * delegation info. That is, if mds >= 0 || ndist > 0. 239 */ 240 #define CEPH_MAX_DIRFRAG_REP 4 241 242 struct ceph_inode_frag { 243 struct rb_node node; 244 245 /* fragtree state */ 246 u32 frag; 247 int split_by; /* i.e. 2^(split_by) children */ 248 249 /* delegation and replication info */ 250 int mds; /* -1 if same authority as parent */ 251 int ndist; /* >0 if replicated */ 252 int dist[CEPH_MAX_DIRFRAG_REP]; 253 }; 254 255 /* 256 * We cache inode xattrs as an encoded blob until they are first used, 257 * at which point we parse them into an rbtree. 258 */ 259 struct ceph_inode_xattr { 260 struct rb_node node; 261 262 const char *name; 263 int name_len; 264 const char *val; 265 int val_len; 266 int dirty; 267 268 int should_free_name; 269 int should_free_val; 270 }; 271 272 /* 273 * Ceph dentry state 274 */ 275 struct ceph_dentry_info { 276 struct dentry *dentry; 277 struct ceph_mds_session *lease_session; 278 struct list_head lease_list; 279 unsigned flags; 280 int lease_shared_gen; 281 u32 lease_gen; 282 u32 lease_seq; 283 unsigned long lease_renew_after, lease_renew_from; 284 unsigned long time; 285 u64 offset; 286 }; 287 288 #define CEPH_DENTRY_REFERENCED 1 289 #define CEPH_DENTRY_LEASE_LIST 2 290 #define CEPH_DENTRY_SHRINK_LIST 4 291 #define CEPH_DENTRY_PRIMARY_LINK 8 292 293 struct ceph_inode_xattrs_info { 294 /* 295 * (still encoded) xattr blob. we avoid the overhead of parsing 296 * this until someone actually calls getxattr, etc. 297 * 298 * blob->vec.iov_len == 4 implies there are no xattrs; blob == 299 * NULL means we don't know. 300 */ 301 struct ceph_buffer *blob, *prealloc_blob; 302 303 struct rb_root index; 304 bool dirty; 305 int count; 306 int names_size; 307 int vals_size; 308 u64 version, index_version; 309 }; 310 311 /* 312 * Ceph inode. 313 */ 314 struct ceph_inode_info { 315 struct ceph_vino i_vino; /* ceph ino + snap */ 316 317 spinlock_t i_ceph_lock; 318 319 u64 i_version; 320 u64 i_inline_version; 321 u32 i_time_warp_seq; 322 323 unsigned long i_ceph_flags; 324 atomic64_t i_release_count; 325 atomic64_t i_ordered_count; 326 atomic64_t i_complete_seq[2]; 327 328 struct ceph_dir_layout i_dir_layout; 329 struct ceph_file_layout i_layout; 330 struct ceph_file_layout i_cached_layout; // for async creates 331 char *i_symlink; 332 333 /* for dirs */ 334 struct timespec64 i_rctime; 335 u64 i_rbytes, i_rfiles, i_rsubdirs; 336 u64 i_files, i_subdirs; 337 338 /* quotas */ 339 u64 i_max_bytes, i_max_files; 340 341 s32 i_dir_pin; 342 343 struct rb_root i_fragtree; 344 int i_fragtree_nsplits; 345 struct mutex i_fragtree_mutex; 346 347 struct ceph_inode_xattrs_info i_xattrs; 348 349 /* capabilities. protected _both_ by i_ceph_lock and cap->session's 350 * s_mutex. */ 351 struct rb_root i_caps; /* cap list */ 352 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ 353 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ 354 355 /* 356 * Link to the auth cap's session's s_cap_dirty list. s_cap_dirty 357 * is protected by the mdsc->cap_dirty_lock, but each individual item 358 * is also protected by the inode's i_ceph_lock. Walking s_cap_dirty 359 * requires the mdsc->cap_dirty_lock. List presence for an item can 360 * be tested under the i_ceph_lock. Changing anything requires both. 361 */ 362 struct list_head i_dirty_item; 363 364 /* 365 * Link to session's s_cap_flushing list. Protected in a similar 366 * fashion to i_dirty_item, but also by the s_mutex for changes. The 367 * s_cap_flushing list can be walked while holding either the s_mutex 368 * or msdc->cap_dirty_lock. List presence can also be checked while 369 * holding the i_ceph_lock for this inode. 370 */ 371 struct list_head i_flushing_item; 372 373 /* we need to track cap writeback on a per-cap-bit basis, to allow 374 * overlapping, pipelined cap flushes to the mds. we can probably 375 * reduce the tid to 8 bits if we're concerned about inode size. */ 376 struct ceph_cap_flush *i_prealloc_cap_flush; 377 struct list_head i_cap_flush_list; 378 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ 379 unsigned long i_hold_caps_max; /* jiffies */ 380 struct list_head i_cap_delay_list; /* for delayed cap release to mds */ 381 struct ceph_cap_reservation i_cap_migration_resv; 382 struct list_head i_cap_snaps; /* snapped state pending flush to mds */ 383 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or 384 dirty|flushing caps */ 385 unsigned i_snap_caps; /* cap bits for snapped files */ 386 387 unsigned long i_last_rd; 388 unsigned long i_last_wr; 389 int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */ 390 391 struct mutex i_truncate_mutex; 392 u32 i_truncate_seq; /* last truncate to smaller size */ 393 u64 i_truncate_size; /* and the size we last truncated down to */ 394 int i_truncate_pending; /* still need to call vmtruncate */ 395 396 u64 i_max_size; /* max file size authorized by mds */ 397 u64 i_reported_size; /* (max_)size reported to or requested of mds */ 398 u64 i_wanted_max_size; /* offset we'd like to write too */ 399 u64 i_requested_max_size; /* max_size we've requested */ 400 401 /* held references to caps */ 402 int i_pin_ref; 403 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref; 404 int i_wrbuffer_ref, i_wrbuffer_ref_head; 405 atomic_t i_filelock_ref; 406 atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */ 407 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ 408 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ 409 410 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ 411 struct list_head i_unsafe_iops; /* uncommitted mds inode ops */ 412 spinlock_t i_unsafe_lock; 413 414 union { 415 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ 416 struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */ 417 }; 418 int i_snap_realm_counter; /* snap realm (if caps) */ 419 struct list_head i_snap_realm_item; 420 struct list_head i_snap_flush_item; 421 struct timespec64 i_btime; 422 struct timespec64 i_snap_btime; 423 424 struct work_struct i_work; 425 unsigned long i_work_mask; 426 427 #ifdef CONFIG_CEPH_FSCACHE 428 struct fscache_cookie *fscache; 429 u32 i_fscache_gen; 430 #endif 431 errseq_t i_meta_err; 432 433 struct inode vfs_inode; /* at end */ 434 }; 435 436 static inline struct ceph_inode_info * 437 ceph_inode(const struct inode *inode) 438 { 439 return container_of(inode, struct ceph_inode_info, vfs_inode); 440 } 441 442 static inline struct ceph_fs_client * 443 ceph_inode_to_client(const struct inode *inode) 444 { 445 return (struct ceph_fs_client *)inode->i_sb->s_fs_info; 446 } 447 448 static inline struct ceph_fs_client * 449 ceph_sb_to_client(const struct super_block *sb) 450 { 451 return (struct ceph_fs_client *)sb->s_fs_info; 452 } 453 454 static inline struct ceph_vino 455 ceph_vino(const struct inode *inode) 456 { 457 return ceph_inode(inode)->i_vino; 458 } 459 460 static inline u32 ceph_ino_to_ino32(u64 vino) 461 { 462 u32 ino = vino & 0xffffffff; 463 ino ^= vino >> 32; 464 if (!ino) 465 ino = 2; 466 return ino; 467 } 468 469 /* 470 * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on 471 * some arches. We generally do not use this value inside the ceph driver, but 472 * we do want to set it to something, so that generic vfs code has an 473 * appropriate value for tracepoints and the like. 474 */ 475 static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino) 476 { 477 if (sizeof(ino_t) == sizeof(u32)) 478 return ceph_ino_to_ino32(vino.ino); 479 return (ino_t)vino.ino; 480 } 481 482 /* for printf-style formatting */ 483 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap 484 485 static inline u64 ceph_ino(struct inode *inode) 486 { 487 return ceph_inode(inode)->i_vino.ino; 488 } 489 490 static inline u64 ceph_snap(struct inode *inode) 491 { 492 return ceph_inode(inode)->i_vino.snap; 493 } 494 495 /** 496 * ceph_present_ino - format an inode number for presentation to userland 497 * @sb: superblock where the inode lives 498 * @ino: inode number to (possibly) convert 499 * 500 * If the user mounted with the ino32 option, then the 64-bit value needs 501 * to be converted to something that can fit inside 32 bits. Note that 502 * internal kernel code never uses this value, so this is entirely for 503 * userland consumption. 504 */ 505 static inline u64 ceph_present_ino(struct super_block *sb, u64 ino) 506 { 507 if (unlikely(ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))) 508 return ceph_ino_to_ino32(ino); 509 return ino; 510 } 511 512 static inline u64 ceph_present_inode(struct inode *inode) 513 { 514 return ceph_present_ino(inode->i_sb, ceph_ino(inode)); 515 } 516 517 static inline int ceph_ino_compare(struct inode *inode, void *data) 518 { 519 struct ceph_vino *pvino = (struct ceph_vino *)data; 520 struct ceph_inode_info *ci = ceph_inode(inode); 521 return ci->i_vino.ino == pvino->ino && 522 ci->i_vino.snap == pvino->snap; 523 } 524 525 526 static inline struct inode *ceph_find_inode(struct super_block *sb, 527 struct ceph_vino vino) 528 { 529 /* 530 * NB: The hashval will be run through the fs/inode.c hash function 531 * anyway, so there is no need to squash the inode number down to 532 * 32-bits first. Just use low-order bits on arches with 32-bit long. 533 */ 534 return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino); 535 } 536 537 538 /* 539 * Ceph inode. 540 */ 541 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */ 542 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */ 543 #define CEPH_I_POOL_PERM (1 << 3) /* pool rd/wr bits are valid */ 544 #define CEPH_I_POOL_RD (1 << 4) /* can read from pool */ 545 #define CEPH_I_POOL_WR (1 << 5) /* can write to pool */ 546 #define CEPH_I_SEC_INITED (1 << 6) /* security initialized */ 547 #define CEPH_I_KICK_FLUSH (1 << 7) /* kick flushing caps */ 548 #define CEPH_I_FLUSH_SNAPS (1 << 8) /* need flush snapss */ 549 #define CEPH_I_ERROR_WRITE (1 << 9) /* have seen write errors */ 550 #define CEPH_I_ERROR_FILELOCK (1 << 10) /* have seen file lock errors */ 551 #define CEPH_I_ODIRECT (1 << 11) /* inode in direct I/O mode */ 552 #define CEPH_ASYNC_CREATE_BIT (12) /* async create in flight for this */ 553 #define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT) 554 555 /* 556 * Masks of ceph inode work. 557 */ 558 #define CEPH_I_WORK_WRITEBACK 0 /* writeback */ 559 #define CEPH_I_WORK_INVALIDATE_PAGES 1 /* invalidate pages */ 560 #define CEPH_I_WORK_VMTRUNCATE 2 /* vmtruncate */ 561 562 /* 563 * We set the ERROR_WRITE bit when we start seeing write errors on an inode 564 * and then clear it when they start succeeding. Note that we do a lockless 565 * check first, and only take the lock if it looks like it needs to be changed. 566 * The write submission code just takes this as a hint, so we're not too 567 * worried if a few slip through in either direction. 568 */ 569 static inline void ceph_set_error_write(struct ceph_inode_info *ci) 570 { 571 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) { 572 spin_lock(&ci->i_ceph_lock); 573 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE; 574 spin_unlock(&ci->i_ceph_lock); 575 } 576 } 577 578 static inline void ceph_clear_error_write(struct ceph_inode_info *ci) 579 { 580 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) { 581 spin_lock(&ci->i_ceph_lock); 582 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE; 583 spin_unlock(&ci->i_ceph_lock); 584 } 585 } 586 587 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci, 588 long long release_count, 589 long long ordered_count) 590 { 591 /* 592 * Makes sure operations that setup readdir cache (update page 593 * cache and i_size) are strongly ordered w.r.t. the following 594 * atomic64_set() operations. 595 */ 596 smp_mb(); 597 atomic64_set(&ci->i_complete_seq[0], release_count); 598 atomic64_set(&ci->i_complete_seq[1], ordered_count); 599 } 600 601 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci) 602 { 603 atomic64_inc(&ci->i_release_count); 604 } 605 606 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci) 607 { 608 atomic64_inc(&ci->i_ordered_count); 609 } 610 611 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci) 612 { 613 return atomic64_read(&ci->i_complete_seq[0]) == 614 atomic64_read(&ci->i_release_count); 615 } 616 617 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci) 618 { 619 return atomic64_read(&ci->i_complete_seq[0]) == 620 atomic64_read(&ci->i_release_count) && 621 atomic64_read(&ci->i_complete_seq[1]) == 622 atomic64_read(&ci->i_ordered_count); 623 } 624 625 static inline void ceph_dir_clear_complete(struct inode *inode) 626 { 627 __ceph_dir_clear_complete(ceph_inode(inode)); 628 } 629 630 static inline void ceph_dir_clear_ordered(struct inode *inode) 631 { 632 __ceph_dir_clear_ordered(ceph_inode(inode)); 633 } 634 635 static inline bool ceph_dir_is_complete_ordered(struct inode *inode) 636 { 637 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode)); 638 smp_rmb(); 639 return ret; 640 } 641 642 /* find a specific frag @f */ 643 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, 644 u32 f); 645 646 /* 647 * choose fragment for value @v. copy frag content to pfrag, if leaf 648 * exists 649 */ 650 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 651 struct ceph_inode_frag *pfrag, 652 int *found); 653 654 static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry) 655 { 656 return (struct ceph_dentry_info *)dentry->d_fsdata; 657 } 658 659 /* 660 * caps helpers 661 */ 662 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) 663 { 664 return !RB_EMPTY_ROOT(&ci->i_caps); 665 } 666 667 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); 668 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); 669 extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask, 670 int t); 671 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, 672 struct ceph_cap *cap); 673 674 static inline int ceph_caps_issued(struct ceph_inode_info *ci) 675 { 676 int issued; 677 spin_lock(&ci->i_ceph_lock); 678 issued = __ceph_caps_issued(ci, NULL); 679 spin_unlock(&ci->i_ceph_lock); 680 return issued; 681 } 682 683 static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, 684 int mask, int touch) 685 { 686 int r; 687 spin_lock(&ci->i_ceph_lock); 688 r = __ceph_caps_issued_mask_metric(ci, mask, touch); 689 spin_unlock(&ci->i_ceph_lock); 690 return r; 691 } 692 693 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) 694 { 695 return ci->i_dirty_caps | ci->i_flushing_caps; 696 } 697 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void); 698 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf); 699 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, 700 struct ceph_cap_flush **pcf); 701 702 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci, 703 struct ceph_cap *ocap, int mask); 704 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); 705 extern int __ceph_caps_used(struct ceph_inode_info *ci); 706 707 static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci) 708 { 709 return ci->i_nr_by_mode[0]; 710 } 711 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); 712 extern int __ceph_caps_wanted(struct ceph_inode_info *ci); 713 714 /* what the mds thinks we want */ 715 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check); 716 717 extern void ceph_caps_init(struct ceph_mds_client *mdsc); 718 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); 719 extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc, 720 struct ceph_mount_options *fsopt); 721 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc, 722 struct ceph_cap_reservation *ctx, int need); 723 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc, 724 struct ceph_cap_reservation *ctx); 725 extern void ceph_reservation_status(struct ceph_fs_client *client, 726 int *total, int *avail, int *used, 727 int *reserved, int *min); 728 729 730 731 /* 732 * we keep buffered readdir results attached to file->private_data 733 */ 734 #define CEPH_F_SYNC 1 735 #define CEPH_F_ATEND 2 736 737 struct ceph_file_info { 738 short fmode; /* initialized on open */ 739 short flags; /* CEPH_F_* */ 740 741 spinlock_t rw_contexts_lock; 742 struct list_head rw_contexts; 743 744 errseq_t meta_err; 745 u32 filp_gen; 746 atomic_t num_locks; 747 }; 748 749 struct ceph_dir_file_info { 750 struct ceph_file_info file_info; 751 752 /* readdir: position within the dir */ 753 u32 frag; 754 struct ceph_mds_request *last_readdir; 755 756 /* readdir: position within a frag */ 757 unsigned next_offset; /* offset of next chunk (last_name's + 1) */ 758 char *last_name; /* last entry in previous chunk */ 759 long long dir_release_count; 760 long long dir_ordered_count; 761 int readdir_cache_idx; 762 763 /* used for -o dirstat read() on directory thing */ 764 char *dir_info; 765 int dir_info_len; 766 }; 767 768 struct ceph_rw_context { 769 struct list_head list; 770 struct task_struct *thread; 771 int caps; 772 }; 773 774 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \ 775 struct ceph_rw_context _name = { \ 776 .thread = current, \ 777 .caps = _caps, \ 778 } 779 780 static inline void ceph_add_rw_context(struct ceph_file_info *cf, 781 struct ceph_rw_context *ctx) 782 { 783 spin_lock(&cf->rw_contexts_lock); 784 list_add(&ctx->list, &cf->rw_contexts); 785 spin_unlock(&cf->rw_contexts_lock); 786 } 787 788 static inline void ceph_del_rw_context(struct ceph_file_info *cf, 789 struct ceph_rw_context *ctx) 790 { 791 spin_lock(&cf->rw_contexts_lock); 792 list_del(&ctx->list); 793 spin_unlock(&cf->rw_contexts_lock); 794 } 795 796 static inline struct ceph_rw_context* 797 ceph_find_rw_context(struct ceph_file_info *cf) 798 { 799 struct ceph_rw_context *ctx, *found = NULL; 800 spin_lock(&cf->rw_contexts_lock); 801 list_for_each_entry(ctx, &cf->rw_contexts, list) { 802 if (ctx->thread == current) { 803 found = ctx; 804 break; 805 } 806 } 807 spin_unlock(&cf->rw_contexts_lock); 808 return found; 809 } 810 811 struct ceph_readdir_cache_control { 812 struct page *page; 813 struct dentry **dentries; 814 int index; 815 }; 816 817 /* 818 * A "snap realm" describes a subset of the file hierarchy sharing 819 * the same set of snapshots that apply to it. The realms themselves 820 * are organized into a hierarchy, such that children inherit (some of) 821 * the snapshots of their parents. 822 * 823 * All inodes within the realm that have capabilities are linked into a 824 * per-realm list. 825 */ 826 struct ceph_snap_realm { 827 u64 ino; 828 struct inode *inode; 829 atomic_t nref; 830 struct rb_node node; 831 832 u64 created, seq; 833 u64 parent_ino; 834 u64 parent_since; /* snapid when our current parent became so */ 835 836 u64 *prior_parent_snaps; /* snaps inherited from any parents we */ 837 u32 num_prior_parent_snaps; /* had prior to parent_since */ 838 u64 *snaps; /* snaps specific to this realm */ 839 u32 num_snaps; 840 841 struct ceph_snap_realm *parent; 842 struct list_head children; /* list of child realms */ 843 struct list_head child_item; 844 845 struct list_head empty_item; /* if i have ref==0 */ 846 847 struct list_head dirty_item; /* if realm needs new context */ 848 849 /* the current set of snaps for this realm */ 850 struct ceph_snap_context *cached_context; 851 852 struct list_head inodes_with_caps; 853 spinlock_t inodes_with_caps_lock; 854 }; 855 856 static inline int default_congestion_kb(void) 857 { 858 int congestion_kb; 859 860 /* 861 * Copied from NFS 862 * 863 * congestion size, scale with available memory. 864 * 865 * 64MB: 8192k 866 * 128MB: 11585k 867 * 256MB: 16384k 868 * 512MB: 23170k 869 * 1GB: 32768k 870 * 2GB: 46340k 871 * 4GB: 65536k 872 * 8GB: 92681k 873 * 16GB: 131072k 874 * 875 * This allows larger machines to have larger/more transfers. 876 * Limit the default to 256M 877 */ 878 congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10); 879 if (congestion_kb > 256*1024) 880 congestion_kb = 256*1024; 881 882 return congestion_kb; 883 } 884 885 886 /* super.c */ 887 extern int ceph_force_reconnect(struct super_block *sb); 888 /* snap.c */ 889 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, 890 u64 ino); 891 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, 892 struct ceph_snap_realm *realm); 893 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, 894 struct ceph_snap_realm *realm); 895 extern int ceph_update_snap_trace(struct ceph_mds_client *m, 896 void *p, void *e, bool deletion, 897 struct ceph_snap_realm **realm_ret); 898 extern void ceph_handle_snap(struct ceph_mds_client *mdsc, 899 struct ceph_mds_session *session, 900 struct ceph_msg *msg); 901 extern void ceph_queue_cap_snap(struct ceph_inode_info *ci); 902 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, 903 struct ceph_cap_snap *capsnap); 904 extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc); 905 906 extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc, 907 u64 snap); 908 extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc, 909 struct ceph_snapid_map *sm); 910 extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc); 911 extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc); 912 913 914 /* 915 * a cap_snap is "pending" if it is still awaiting an in-progress 916 * sync write (that may/may not still update size, mtime, etc.). 917 */ 918 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) 919 { 920 return !list_empty(&ci->i_cap_snaps) && 921 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap, 922 ci_item)->writing; 923 } 924 925 /* inode.c */ 926 struct ceph_mds_reply_info_in; 927 struct ceph_mds_reply_dirfrag; 928 929 extern const struct inode_operations ceph_file_iops; 930 931 extern struct inode *ceph_alloc_inode(struct super_block *sb); 932 extern void ceph_evict_inode(struct inode *inode); 933 extern void ceph_free_inode(struct inode *inode); 934 935 extern struct inode *ceph_get_inode(struct super_block *sb, 936 struct ceph_vino vino); 937 extern struct inode *ceph_get_snapdir(struct inode *parent); 938 extern int ceph_fill_file_size(struct inode *inode, int issued, 939 u32 truncate_seq, u64 truncate_size, u64 size); 940 extern void ceph_fill_file_time(struct inode *inode, int issued, 941 u64 time_warp_seq, struct timespec64 *ctime, 942 struct timespec64 *mtime, 943 struct timespec64 *atime); 944 extern int ceph_fill_inode(struct inode *inode, struct page *locked_page, 945 struct ceph_mds_reply_info_in *iinfo, 946 struct ceph_mds_reply_dirfrag *dirinfo, 947 struct ceph_mds_session *session, int cap_fmode, 948 struct ceph_cap_reservation *caps_reservation); 949 extern int ceph_fill_trace(struct super_block *sb, 950 struct ceph_mds_request *req); 951 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, 952 struct ceph_mds_session *session); 953 954 extern int ceph_inode_holds_cap(struct inode *inode, int mask); 955 956 extern bool ceph_inode_set_size(struct inode *inode, loff_t size); 957 extern void __ceph_do_pending_vmtruncate(struct inode *inode); 958 extern void ceph_queue_vmtruncate(struct inode *inode); 959 extern void ceph_queue_invalidate(struct inode *inode); 960 extern void ceph_queue_writeback(struct inode *inode); 961 extern void ceph_async_iput(struct inode *inode); 962 963 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 964 int mask, bool force); 965 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force) 966 { 967 return __ceph_do_getattr(inode, NULL, mask, force); 968 } 969 extern int ceph_permission(struct inode *inode, int mask); 970 extern int __ceph_setattr(struct inode *inode, struct iattr *attr); 971 extern int ceph_setattr(struct dentry *dentry, struct iattr *attr); 972 extern int ceph_getattr(const struct path *path, struct kstat *stat, 973 u32 request_mask, unsigned int flags); 974 975 /* xattr.c */ 976 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int); 977 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t); 978 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); 979 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci); 980 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); 981 extern const struct xattr_handler *ceph_xattr_handlers[]; 982 983 struct ceph_acl_sec_ctx { 984 #ifdef CONFIG_CEPH_FS_POSIX_ACL 985 void *default_acl; 986 void *acl; 987 #endif 988 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 989 void *sec_ctx; 990 u32 sec_ctxlen; 991 #endif 992 struct ceph_pagelist *pagelist; 993 }; 994 995 #ifdef CONFIG_SECURITY 996 extern bool ceph_security_xattr_deadlock(struct inode *in); 997 extern bool ceph_security_xattr_wanted(struct inode *in); 998 #else 999 static inline bool ceph_security_xattr_deadlock(struct inode *in) 1000 { 1001 return false; 1002 } 1003 static inline bool ceph_security_xattr_wanted(struct inode *in) 1004 { 1005 return false; 1006 } 1007 #endif 1008 1009 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1010 extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1011 struct ceph_acl_sec_ctx *ctx); 1012 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1013 { 1014 security_inode_invalidate_secctx(inode); 1015 } 1016 #else 1017 static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1018 struct ceph_acl_sec_ctx *ctx) 1019 { 1020 return 0; 1021 } 1022 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1023 { 1024 } 1025 #endif 1026 1027 void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); 1028 1029 /* acl.c */ 1030 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1031 1032 struct posix_acl *ceph_get_acl(struct inode *, int); 1033 int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type); 1034 int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1035 struct ceph_acl_sec_ctx *as_ctx); 1036 void ceph_init_inode_acls(struct inode *inode, 1037 struct ceph_acl_sec_ctx *as_ctx); 1038 1039 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1040 { 1041 forget_all_cached_acls(inode); 1042 } 1043 1044 #else 1045 1046 #define ceph_get_acl NULL 1047 #define ceph_set_acl NULL 1048 1049 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1050 struct ceph_acl_sec_ctx *as_ctx) 1051 { 1052 return 0; 1053 } 1054 static inline void ceph_init_inode_acls(struct inode *inode, 1055 struct ceph_acl_sec_ctx *as_ctx) 1056 { 1057 } 1058 static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode) 1059 { 1060 return 0; 1061 } 1062 1063 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1064 { 1065 } 1066 1067 #endif 1068 1069 /* caps.c */ 1070 extern const char *ceph_cap_string(int c); 1071 extern void ceph_handle_caps(struct ceph_mds_session *session, 1072 struct ceph_msg *msg); 1073 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, 1074 struct ceph_cap_reservation *ctx); 1075 extern void ceph_add_cap(struct inode *inode, 1076 struct ceph_mds_session *session, u64 cap_id, 1077 unsigned issued, unsigned wanted, 1078 unsigned cap, unsigned seq, u64 realmino, int flags, 1079 struct ceph_cap **new_cap); 1080 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release); 1081 extern void __ceph_remove_caps(struct ceph_inode_info *ci); 1082 extern void ceph_put_cap(struct ceph_mds_client *mdsc, 1083 struct ceph_cap *cap); 1084 extern int ceph_is_any_caps(struct inode *inode); 1085 1086 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); 1087 extern int ceph_fsync(struct file *file, loff_t start, loff_t end, 1088 int datasync); 1089 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc, 1090 struct ceph_mds_session *session); 1091 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 1092 struct ceph_mds_session *session); 1093 void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session, 1094 struct ceph_inode_info *ci); 1095 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, 1096 int mds); 1097 extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps, 1098 bool snap_rwsem_locked); 1099 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); 1100 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); 1101 extern void ceph_put_cap_refs_no_check_caps(struct ceph_inode_info *ci, 1102 int had); 1103 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 1104 struct ceph_snap_context *snapc); 1105 extern void ceph_flush_snaps(struct ceph_inode_info *ci, 1106 struct ceph_mds_session **psession); 1107 extern bool __ceph_should_report_size(struct ceph_inode_info *ci); 1108 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags, 1109 struct ceph_mds_session *session); 1110 extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc); 1111 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); 1112 extern int ceph_drop_caps_for_unlink(struct inode *inode); 1113 extern int ceph_encode_inode_release(void **p, struct inode *inode, 1114 int mds, int drop, int unless, int force); 1115 extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 1116 struct inode *dir, 1117 int mds, int drop, int unless); 1118 1119 extern int ceph_get_caps(struct file *filp, int need, int want, 1120 loff_t endoff, int *got, struct page **pinned_page); 1121 extern int ceph_try_get_caps(struct inode *inode, 1122 int need, int want, bool nonblock, int *got); 1123 1124 /* for counting open files by mode */ 1125 extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count); 1126 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count); 1127 extern void __ceph_touch_fmode(struct ceph_inode_info *ci, 1128 struct ceph_mds_client *mdsc, int fmode); 1129 1130 /* addr.c */ 1131 extern const struct address_space_operations ceph_aops; 1132 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); 1133 extern int ceph_uninline_data(struct file *filp, struct page *locked_page); 1134 extern int ceph_pool_perm_check(struct inode *inode, int need); 1135 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc); 1136 1137 /* file.c */ 1138 extern const struct file_operations ceph_file_fops; 1139 1140 extern int ceph_renew_caps(struct inode *inode, int fmode); 1141 extern int ceph_open(struct inode *inode, struct file *file); 1142 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, 1143 struct file *file, unsigned flags, umode_t mode); 1144 extern int ceph_release(struct inode *inode, struct file *filp); 1145 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, 1146 char *data, size_t len); 1147 1148 /* dir.c */ 1149 extern const struct file_operations ceph_dir_fops; 1150 extern const struct file_operations ceph_snapdir_fops; 1151 extern const struct inode_operations ceph_dir_iops; 1152 extern const struct inode_operations ceph_snapdir_iops; 1153 extern const struct dentry_operations ceph_dentry_ops; 1154 1155 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order); 1156 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); 1157 extern int ceph_handle_snapdir(struct ceph_mds_request *req, 1158 struct dentry *dentry, int err); 1159 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 1160 struct dentry *dentry, int err); 1161 1162 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di); 1163 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di); 1164 extern void ceph_invalidate_dentry_lease(struct dentry *dentry); 1165 extern int ceph_trim_dentries(struct ceph_mds_client *mdsc); 1166 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn); 1167 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl); 1168 1169 /* ioctl.c */ 1170 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 1171 1172 /* export.c */ 1173 extern const struct export_operations ceph_export_ops; 1174 struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino); 1175 1176 /* locks.c */ 1177 extern __init void ceph_flock_init(void); 1178 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl); 1179 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl); 1180 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num); 1181 extern int ceph_encode_locks_to_buffer(struct inode *inode, 1182 struct ceph_filelock *flocks, 1183 int num_fcntl_locks, 1184 int num_flock_locks); 1185 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks, 1186 struct ceph_pagelist *pagelist, 1187 int num_fcntl_locks, int num_flock_locks); 1188 1189 /* debugfs.c */ 1190 extern void ceph_fs_debugfs_init(struct ceph_fs_client *client); 1191 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); 1192 1193 /* quota.c */ 1194 static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci) 1195 { 1196 return ci->i_max_files || ci->i_max_bytes; 1197 } 1198 1199 extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc); 1200 1201 static inline void __ceph_update_quota(struct ceph_inode_info *ci, 1202 u64 max_bytes, u64 max_files) 1203 { 1204 bool had_quota, has_quota; 1205 had_quota = __ceph_has_any_quota(ci); 1206 ci->i_max_bytes = max_bytes; 1207 ci->i_max_files = max_files; 1208 has_quota = __ceph_has_any_quota(ci); 1209 1210 if (had_quota != has_quota) 1211 ceph_adjust_quota_realms_count(&ci->vfs_inode, has_quota); 1212 } 1213 1214 extern void ceph_handle_quota(struct ceph_mds_client *mdsc, 1215 struct ceph_mds_session *session, 1216 struct ceph_msg *msg); 1217 extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); 1218 extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, 1219 loff_t newlen); 1220 extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode, 1221 loff_t newlen); 1222 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, 1223 struct kstatfs *buf); 1224 extern int ceph_quota_check_rename(struct ceph_mds_client *mdsc, 1225 struct inode *old, struct inode *new); 1226 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc); 1227 1228 #endif /* _FS_CEPH_SUPER_H */ 1229